B1353

General Description

Passenger Air bag module (hereinafter referred to PAB) located at passenger side crush pad protects passenger by reducing impact of collision.
PAB is consist of air bag, pat cover and inflator.
Air bag reduces impact of collision by filled up gas.
Inflator keeps gas and uses it to deploy air bag on collision.

CAUTION:
Never measure resistance of PAB directly, Current of measuring device may cause unexpected air bag deploy.

DTC Description

The SRSCM sets DTC B1353 if the measured resistance value of PAB circuit is less than the threshold value.
*In this case, SRSCM checks if there's any fault in circuit by sending current for a while.

DTC Detecting Condition






Specification






Diagnostic Circuit Diagram






Monitor Scantool Data

1. Ignition "OFF", connect scantool.
2. Ignition "ON"& Engine "OFF", select "Current Data" mode.
3. Monitor the "Passenger airbag(1st stage) resistance" parameter on the Scantool.

Specification :
0.9Ohms< Resistance of Passenger airbag(1st stage) < 6.6Ohms

Reference :
In a case of an open in the Passenger airbag(1st stage) circuit : FAIL
In a case of a short to battery in the Passenger airbag(1st stage) circuit: FAIL
In a case of a short to ground in the Passenger airbag(1st stage) circuit : FAIL






Fig.1) Normal Data

4. Is parameter displayed within specifications?






Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check shorting bar/shorting bar release pin and connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?






Squib Circuit Inspection

1. Ignition "OFF".
2. Disconnect (-) terminal cable from battery and wait for 1 minutes or more.
3. Remove the PAB module and connect the dummy (0957A-38200) and dummy adapter (0957A-2E100) to PAB harness connector.

NOTE:
If dummy and dummy adaptor are not able to be prepared, use a known-good PAB or 2Ohms resistor.

WARNING:
Lay Removed PAB facing upward for unexpected air bag deploy.

4. Connect (-) terminal cable to battery and Ignition "ON" & Engine "OFF" and wait for 30 seconds or more.
5. Connect scantool to Data Link Connector(DLC) and clear DTC with scantool and diagnose again.
6. Is DTC present problem ?






Main harness Circuit Inspection

1. Ignition "OFF".
2. Disconnect the battery (-) terminal cable from the battery and wait at least one minutes.
3. Disconnect PAB connector and SRSCM main harness connector.

WARNING:
Lay Removed PAB facing upward for unexpected air bag deploy.

4. Measure resistance between terminal "Low.1" and "High.1" of the PAB harness connector.

Specification :approx. 1 Ohms below

5. Is the measured resistance within specifications?






Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes(DTC)" mode.
2. Using a scan tool, clear the DTC.
3. Operate the vehicle within DTC Enable conditions in General information.
4. Are any DTC present ?